Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b662d0c23b75b4…

MALICIOUS

PDF

89.6 KB Created: 2021-03-03 23:14:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3057db78a71620ada1864ab4ba2acf11 SHA-1: 23b5a0366e9dc379acfb4edd7f421985e9f376b5 SHA-256: 70b662d0c23b75b4abf933a76b088ab98f63feebbb7b9f69f837a0dde751890e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/award?keyword=easy+pop+songs+to+play+on+piano+sheet+music PDF link annotation
    • http://xruhdfo.site/walalofjssrz.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/3Kx7jiS/pisope.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/jdgdxA4/easy_diy_paper_christmas_crafts.pdfIn PDF document text
    • http://waliwosodumobu.iblogger.org/anjali_movie_songs_tamil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5fcf704383768.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogivotosu/idd4ujb/black_and_gold_crackle_nail_polish.pdfIn PDF document text
    • http://cheeronthemove.store/emma_goldman_living_my_life_amazon5ea9e.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/qXLCAja/nakejimujemupabodubedizaf.pdfIn PDF document text
    • https://cdn.sqhk.co/sulugedako/igvb7VM/propane_radiant_heater_outdoor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497372/normal_6002e8aa743eb.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/l7ujdgj/35545594257.pdfIn PDF document text
    • http://vykupavto54.ru/55998666805p5d1x.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/x2EHjaf/police_car_driving_simulator_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xafogatok/higciaN/under_cupid_s_spell_crossword_clue.pdfIn PDF document text
    • http://forecast.bet/wireguvhzj4o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_601ad6aa76091.pdfIn PDF document text
    • http://gnfcns.info/504038922824572j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384316/normal_5fcf09b3defb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_5fd37a1c93edb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diwuzenebixo.epizy.com/lanukafibede.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E50 5308 bytes
SHA-256: 34b7d3893fee8ca2db60ec04336d3e7fe6c9526497436e0b5a1b3820e8795240
font_01_sfnt_off0001204b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204B 10276 bytes
SHA-256: 7373d83ec4743e2037d486ba44e4bbe96109ef188f8f42aa89b155c0535af760
font_02_sfnt_off000143b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B4 16100 bytes
SHA-256: b59afbb2f683942213df284fd86cd9422ada0c5f1ffac7698db8c94a40390bc4

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